The World No. 67, who upset third seed Alex de Minaur in the second round, saved all three break points he faced and won 80 per cent (28/35) of his first-serve points to advance after 70 minutes in their first ATP Head2Head meeting.
“It feels awesome,” Giron said in his on-court interview. “First of all, tough match to John. He is a force on the ATP Tour, so I am really happy to get the win. It feels great to be in the semi-finals, but I don’t want to stop there. I want to keep going.”
FOLLOW THIS WEEK’S ACTION
Giron has enjoyed strong results recently, reaching quarter-finals on hard in Winston-Salem and Metz in the past month. The 28-year-old also enjoyed a run to the last eight in Halle in June.
“I think they both [resilience and confidence] go hand in hand. If you are resilient and come back from tough situations it gives you confidence and next time you are under pressure you feed off that past success. I am building on the past month. I have been playing good tennis. In the second set he had break points to get back on serve, so I am really happy with how I played there.”
Millman was aiming to reach his first tour-level semi-final since Nur-Sultan in 2020, where he went on to lift his maiden ATP Tour trophy.